Contact Info vCARD

T: +1 213.229.7135
F: +1 213.229.6135

Los Angeles Office
333 South Grand Avenue
Los Angeles, CA 90071-3197, USA


Thomas J. P. McHenry is a partner in Gibson, Dunn & Crutcher's Los Angeles office and a member of the firm's Environment and Natural Resources Practice Group. Mr. McHenry practices general environmental law with an emphasis on air quality, hazardous waste, environmental diligence, land use and energy issues. He represents clients in negotiations with state and federal environmental agencies including air quality management districts, regional water quality control boards, the Department of Toxic Substances Control and the California and U.S. Environmental Protection Agencies in the context of air quality, soil and groundwater cleanup, California Environmental Quality Act (CEQA), facility siting, permitting and other environmental and natural resources issues. In 2017, Mr. McHenry was selected as a ranked lawyer in Chambers USA: America's Leading Lawyers for Business for his environmental litigation expertise where he was noted as a "very strong player" in the CERCLA litigation field.

Mr. McHenry has served on a number of California governmental advisory bodies including: the California EPA Blue Ribbon Commission for a Unified Environmental Statute, the Department of Toxic Substances Control CEQA Guidance Advisory Committee, the DTSC Regulatory Structure Update, Fee Reform and Site Mitigation Update Committees and on the Environmental and Consumer Sources Work Group of the California Strategic Planning Project to Eliminate Lead Poisoning. Mr. McHenry was also appointed to serve on the City of Los Angeles Citizens Advisory Committee for the Northeast Area Plan.

Mr. McHenry served as a law clerk to the Honorable Lawrence K. Karlton, Chief United States District Judge of the Eastern District of California, in Sacramento from 1984 to 1986. He graduated from New York University Law School in 1983 where he served on the Journal of International Law and Politics. He received a Master of Forest Science Degree from the Yale School of Forestry and Environmental Studies in 1980 and a Bachelor of Arts degree in history from Yale College in 1977.

Mr. McHenry was formerly a partner in the law firm of McClintock, Weston, Benshoof, Rochefort, Rubalcava & MacCuish in Los Angeles. He was a Special Environmental Counsel to the Northrop Corporation in El Segundo, California in August-December 1990. He is a Visiting Associate Professor of Government at Claremont McKenna College where he teaches environmental law and policy.


  • New York University - 1983 - Juris Doctor
  • Yale University - 1980 - Master of Forest Science
  • Yale University - 1977 - Bachelor of Arts


  • California Bar
  • New York Bar